EP 0438790 B1 19940119 - Process for the separation and the concentration of gallium from an aqueous solution containing gallium together with aluminium, zinc and/or copper.
Title (en)
Process for the separation and the concentration of gallium from an aqueous solution containing gallium together with aluminium, zinc and/or copper.
Title (de)
Verfahren zur Abtrennung und Aufkonzentrierung von Gallium aus einer wässrigen Lösung, die Gallium zusammen mit Aluminium, Zink und/oder Kupfer enthält.
Title (fr)
Procédé pour la séparation et la concentration du gallium à partir d'une solution aqueuse contenant le gallium accompagné d'aluminium, zinc et/ou cuivre.
Publication
Application
Priority
LU 87662 A 19900119
Abstract (en)
[origin: EP0438790A1] Process for separating and concentrating gallium from an aqueous solution containing gallium, together with aluminium, zinc and/or copper, characterized by the following combination of features: (a) preparation of a water-in-oil emulsion consisting of a neutral or alkaline aqueous phase and an organic phase containing an oil-soluble reactant in a homogenizer in a volume ratio of aqueous phase to organic phase of 2:2 to 3:2; (b) dispersion of the water-in-oil emulsion in the aqueous solution containing gallium, which is adjusted to at least 4 mol/l of HCl, in an extractor in a volume ratio of aqueous phase to water-in-oil emulsion of 30:1 to 10:1 until droplets of the water-in-oil emulsion with a diameter less than or equal to 1 mm are obtained; (c) separation of the water-in-oil emulsion from the aqueous continuum and splitting of the emulsion in a reactor with coaxial, double-insulated electrodes in a high-voltage kV/cm and a frequency greater than 50 Hz, the unsplit portion of the water-in-oil emulsion being recycled into step (b); (d) separation of the electrocoalesced organic phase of the water-in-oil emulsion in a gravity separator and recycling of the same into step (a).
IPC 1-7
IPC 8 full level
B01D 61/40 (2006.01); C01G 15/00 (2006.01)
CPC (source: EP US)
C01G 15/003 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0438790 A1 19910731; EP 0438790 B1 19940119; AT E100422 T1 19940215; CA 2072761 A1 19910720; DE 59004340 D1 19940303; DK 0438790 T3 19940509; ES 2049399 T3 19940416; IE 64360 B1 19950726; IE 910180 A1 19910731; JP H05504753 A 19930722; LU 87662 A1 19911008; PT 96514 A 19911015; US 5326441 A 19940705; WO 9110621 A1 19910725
DOCDB simple family (application)
EP 90125593 A 19901227; AT 90125593 T 19901227; CA 2072761 A 19901227; DE 59004340 T 19901227; DK 90125593 T 19901227; EP 9002321 W 19901227; ES 90125593 T 19901227; IE 18091 A 19910118; JP 50182890 A 19901227; LU 87662 A 19900119; PT 9651491 A 19910118; US 89060292 A 19920713